Audio listening system



FIG. 1 is a front left perspective view of an audio listening system showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in the figures show portions of the audio listening system that form no part of the claimed design. 

CLAIM The ornamental design for an audio listening system, as shown and described. 